JPS63180961U - - Google Patents
Info
- Publication number
- JPS63180961U JPS63180961U JP1987072477U JP7247787U JPS63180961U JP S63180961 U JPS63180961 U JP S63180961U JP 1987072477 U JP1987072477 U JP 1987072477U JP 7247787 U JP7247787 U JP 7247787U JP S63180961 U JPS63180961 U JP S63180961U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- outputs
- sample hold
- output
- flop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 230000003321 amplification Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Lasers (AREA)
Description
第１図は本考案に係わるレーザ光オン・オフ制
御回路の一実施例を示す回路図、第２図はその動
作を説明するためのタイムチヤート、第３図は本
考案の第２の実施例を示す回路図である。
１……増幅部、２……受光素子、３……サンプ
ルホールド部、４……Ｄ／Ａコンバータ、５……
コンパレータ、６……フリツプフロツプ、７……
アンドゲート。
Fig. 1 is a circuit diagram showing one embodiment of the laser beam on/off control circuit according to the present invention, Fig. 2 is a time chart for explaining its operation, and Fig. 3 is a second embodiment of the present invention. FIG. DESCRIPTION OF SYMBOLS 1... Amplification section, 2... Light receiving element, 3... Sample hold section, 4... D/A converter, 5...
Comparator, 6...Flip-flop, 7...
And gate.
Claims (1)
射光を受けた受光素子からの出力信号を増幅して
第１および第２の信号を出力する増幅部と、前記
第１の信号をレーザのＱスイツチパルスの後縁部
でサンプルホールドしてサンプルホールド信号を
出力するサンプルホールド部と、前記サンプルホ
ールド信号に加算されるオフセツト信号を出力す
るＤ／Ａコンバータと、前記サンプルホールド信
号とオフセツト信号とを加算した加算信号と前記
第２の信号とを比較するコンパレータと、このコ
ンパレータから出力される比較信号又はこの比較
信号を反転した反転比較信号を入力するフリツプ
フロツプと、このフリツプフロツプからの出力信
号と前記Ｑスイツチパルスとが入力されるアンド
ゲートとを備え、このアンドゲートからの出力信
号によりレーザ光のオン・オフを制御することを
特徴とするレーザ光オン・オフ制御回路。 an amplifying section that amplifies an output signal from a light receiving element that receives reflected light of light irradiated onto a substrate coaxially with the laser optical axis and outputs first and second signals; a sample hold section that samples and holds the trailing edge of the Q switch pulse and outputs a sample hold signal; a D/A converter that outputs an offset signal to be added to the sample hold signal; and a D/A converter that outputs an offset signal to be added to the sample hold signal; a comparator that compares the addition signal obtained by adding the signals and the second signal; a flip-flop that receives a comparison signal output from the comparator or an inverted comparison signal obtained by inverting the comparison signal; and an output signal from the flip-flop. 1. A laser beam on/off control circuit comprising an AND gate into which the Q switch pulse is input, and controlling on/off of a laser beam by an output signal from the AND gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987072477U JPS63180961U (en) | 1987-05-15 | 1987-05-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987072477U JPS63180961U (en) | 1987-05-15 | 1987-05-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63180961U true JPS63180961U (en) | 1988-11-22 |
Family
ID=30915957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987072477U Pending JPS63180961U (en) | 1987-05-15 | 1987-05-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63180961U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013107089A (en) * | 2011-11-17 | 2013-06-06 | Fanuc Ltd | Laser beam machining system having auxiliary control unit |
-
1987
- 1987-05-15 JP JP1987072477U patent/JPS63180961U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013107089A (en) * | 2011-11-17 | 2013-06-06 | Fanuc Ltd | Laser beam machining system having auxiliary control unit |
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